Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Photoelectric insulation protector for serial port

A technology of photoelectric isolation and protector, which is applied in the direction of TV, instruments, electrical components, etc., can solve the problems of serial port burnout, computer serial port easy burnout, etc., improve reliability, solve computer serial port easy burnout, and meet production requirements Effect

Active Publication Date: 2008-04-16
HISENSE +1
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem in the prior art that when the software of the flash board in the TV is upgraded through the serial port of the computer, the serial port is easily burned out, the present invention provides a new type of serial port photoelectric isolation protector, through a simple circuit structure Realized the complete electrical isolation between the TV serial port and the computer serial port, effectively solved the problem that the computer serial port is easy to burn out when the software is upgraded, and ensured the reliability of the system work

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Photoelectric insulation protector for serial port
  • Photoelectric insulation protector for serial port

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0013] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0014] figure 1 Among them, U1 is a computer system, U2 is a TV system, and a high-speed serial port photoelectric isolation protector U3 is connected between the RS232 serial port of the computer system U1 and the RS232 serial port of the TV system U2. In the computer system U1, the 220V AC is rectified by the rectifier bridge to produce 300V DC. Under the conversion of the switching power supply system, various voltage signals described in the internal circuit of the computer are output to provide working power for the internal circuit. Among them, the +5V voltage output by the switching power supply system can provide the working voltage for the part A circuit of the serial port photoelectric isolation protector U3. In the actual connection circuit, the +5V voltage is extracted from the computer through the USB interface.

[0015...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The photoelectric insulation protector is connected between 232 interface of core board and 232 interface of PC. In the protector, a signal conversion chip is connected to 232 interface of core board and 232 interface of PC respectively. A piece of optically coupled isolator is connected between the said signal conversion chips. Under condition of ensuring transfer of RS 232 signal correctly, the protector insulates between TV set and electric system of computer thoroughly. The invention solves issue that serial port of computer is easy to be burned out I time of upgrading software as well as raises reliability of system operation. Features are: simple structure, stable performance, supporting eight routes of series port simultaneously, and reading and writing speed reached to 115200 bps.

Description

technical field [0001] The invention relates to a communication circuit between serial ports, in particular to a photoelectric isolation protection circuit for realizing communication between a TV core board and a computer serial port. Background technique [0002] With the gradual popularization and use of flat-panel TVs, the software of the TV sets is also becoming more and more complicated. During the production process, the software upgrade of the flash board often occurs, and the upgrade task is heavy. The upgrade is realized through the serial port of the computer. Since it is hot plugged, it is easy to burn out the serial port of the computer. According to the experimental analysis, the burning of the serial port is mainly caused by the following reasons: 1. On the upgrade line, when the stereo headphone plug is inserted into the socket of the circuit board, the left channel is in contact with the ground first. Since the left channel is at the RS232 level, that is -1...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/765G06F13/00G06F9/445
Inventor 张明龙王显刚刘风雷李威邱圣龙周建勇
Owner HISENSE
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com